6G69

Crystal structure of a parallel seven-helix coiled coil CC-Type2-IL-Sg-L17E


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.276 
  • R-Value Work: 0.207 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Maintaining and breaking symmetry in homomeric coiled-coil assemblies.

Rhys, G.G.Wood, C.W.Lang, E.J.M.Mulholland, A.J.Brady, R.L.Thomson, A.R.Woolfson, D.N.

(2018) Nat Commun 9: 4132-4132

  • DOI: 10.1038/s41467-018-06391-y
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • In coiled-coil (CC) protein structures α-helices wrap around one another to form rope-like assemblies. Most natural and designed CCs have two-four helices and cyclic (C <sub>n </sub>) or dihedral (D <sub>n </sub>) symmetry. Increasingly, CCs with fiv ...

    In coiled-coil (CC) protein structures α-helices wrap around one another to form rope-like assemblies. Most natural and designed CCs have two-four helices and cyclic (C n ) or dihedral (D n ) symmetry. Increasingly, CCs with five or more helices are being reported. A subset of these higher-order CCs is of interest as they have accessible central channels that can be functionalised; they are α-helical barrels. These extended cavities are surprising given the drive to maximise buried hydrophobic surfaces during protein folding and assembly in water. Here, we show that α-helical barrels can be maintained by the strategic placement of β-branched aliphatic residues lining the lumen. Otherwise, the structures collapse or adjust to give more-complex multi-helix assemblies without C n or D n symmetry. Nonetheless, the structural hallmark of CCs-namely, knobs-into-holes packing of side chains between helices-is maintained leading to classes of CCs hitherto unobserved in nature or accessed by design.


    Organizational Affiliation

    School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK. Guto.Rhys@bristol.ac.uk.,Centre for Computational Chemistry, School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK.,School of Biochemistry, University of Bristol, Medical Sciences Building, University Walk, Bristol, BS8 1TD, UK.,School of Biochemistry, University of Bristol, Medical Sciences Building, University Walk, Bristol, BS8 1TD, UK. D.N.Woolfson@bristol.ac.uk.,BrisSynBio, University of Bristol, Life Sciences Building, Tyndall Avenue, Bristol, BS8 1TQ, UK.,School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK. D.N.Woolfson@bristol.ac.uk.,School of Chemistry, University of Glasgow, Glasgow, G12 8QQ, UK.,School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK.,BrisSynBio, University of Bristol, Life Sciences Building, Tyndall Avenue, Bristol, BS8 1TQ, UK. D.N.Woolfson@bristol.ac.uk.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CC-Type2-IL-Sg-L17E
A, B, C, D, E, F, G, H, I, J, K, L, M, N
32N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MRD
Query on MRD

Download SDF File 
Download CCD File 
H
(4R)-2-METHYLPENTANE-2,4-DIOL
C6 H14 O2
SVTBMSDMJJWYQN-RXMQYKEDSA-N
 Ligand Interaction
MPD
Query on MPD

Download SDF File 
Download CCD File 
A, B, H, M
(4S)-2-METHYL-2,4-PENTANEDIOL
C6 H14 O2
SVTBMSDMJJWYQN-YFKPBYRVSA-N
 Ligand Interaction
Modified Residues  2 Unique
IDChainsTypeFormula2D DiagramParent
NH2
Query on NH2
A, B, C, D, E, F, G, H, I, J, K, L, M, N
NON-POLYMERH2 N

--

ACE
Query on ACE
A, B, C, D, E, F, G, H, I, J, K, L, M, N
NON-POLYMERC2 H4 O

--

Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.276 
  • R-Value Work: 0.207 
  • Space Group: H 3
Unit Cell:
Length (Å)Angle (°)
a = 66.770α = 90.00
b = 66.770β = 90.00
c = 243.197γ = 120.00
Software Package:
Software NamePurpose
PHASERphasing
iMOSFLMdata reduction
Aimlessdata scaling
REFMACrefinement
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Engineering and Physical Sciences Research CouncilUnited KingdomEP/G036764/1
European Research CouncilUnited Kingdom340764

Revision History 

  • Version 1.0: 2018-10-17
    Type: Initial release
  • Version 1.1: 2019-01-23
    Type: Data collection, Derived calculations